Who knew drinking fermented apple juice would become such a popular practice for boosting health? Fermented apple juice is also called apple cider vinegar (ACV). The health benefits of ACV are sometimes hotly debated, but what we’re sure of are ways people could be using it incorrectly.

Here’s a list of eight things you should never do if you’re taking apple cider vinegar. If you avoid these things, you’ll help prevent accidental harm from ACV consumption.

8. Don’t Drink It Undiluted

If you’re thinking of tossing back straight shots of apple cider vinegar, first consider how destructive that could be.

ACV shots — or simply drinking it undiluted — have become popular for aiding in weight loss, lowering blood sugar and other possible health benefits. However, the high acidity of apple cider vinegar could cause damage to your esophagus and other organs along your digestive tract.

To avoid esophageal harm or worse, dilute your ACV before drinking it. The Gerson Institute recommends diluting one tablespoon of apple cider vinegar with one cup of water or your favorite herbal tea.

7. Don’t Drink Too Much of It

A little bit of ACV goes a long way. Drinking too much of it could cause a depletion of potassium in your body, among other negative side effects. Dangerously low potassium levels could lead to symptoms of fatigue, weak bones, muscle cramps and heart arrhythmia.

How much apple cider vinegar you can safely drink could depend on your age and general health. Consuming no more than eight ounces per day is a popular suggested limit. Check with your doctor for their recommendations based on your body’s individual needs.